John Deere 42C Deck Mulching Kit

Part Number: BM21816
22 Review(s)
John Deere 42C Deck Mulching Kit
John Deere 42C Deck Mulching Kit
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Your Price: $128.40
John Deere 42C Deck Mulching Kit
Brand John Deere


The mulching attachment for the 42-in. mower provides excellent performance. This is a high-performance mulching attachment that includes a mulch plug and special mulching blades. 

Remember you will have to follow the 1/3rd rule. No more than 1/3 of the grass blade should be cut off at one time. This allows more efficient mulching and will promote the continued good health of the grass. If the desired cut height can't be achieved by cutting off 1/3, or there is clumping of the clippings, it may be required to cut higher; wait a day, then lower the mower and make a second pass. Mow at proper intervals approximately every 4 to 5 days.

This 42C mulching kit is compatible on the following models with 42C decks that have two blades.

SST15 With C deck Not the AP ( All-Purpose ) Deck
L100 Series


  • California use info:

    ⚠ Warning: Cancer and Reproductive Harm -

Feature 13


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Customer Reviews

Home Gardener
I purchased and effortlessly installed the 42C mulching kit, and it was a great improvement over bagging all the clippings. The finished cut is smoother than bagging possibly due to the variables of full/empty weight of the bags. Now the lawn is consistently smooth, no clumping or piling of clippings, also mows damp grass with good results.
Did you find this helpful?  6 of 7 Found Helpful
Reviewed by:  from Shawnee, Kansas. on 5/11/2015
This is a terrific unit. Its working great on my lawn. Instructions say to remove deck. I didn't. I lifted the front end of my z235 and supported it with a small step ladder with the brake on and wheels chocked. I left the unit out in the sun to become a little more pliable while i cleaned the deck thoroughly. it slipped right in and went on pretty easily. Whole thing took about 15-20 minutes. Well worth the cost and effort.Highly recommend this to anyone.
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from Palm City Fl. on 6/22/2016
Glad to have it,works fine and makes my lawn look better,Not as easy to install as I thought it would be ,well for A 74 year old I guess it was fairly easy.
Did you find this helpful?  2 of 3 Found Helpful
Reviewed by:  from Blackshear,Ga.. on 7/1/2015
Easy to install.
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Reviewed by:  from Douglasville. on 5/13/2020
Outstanding in operation and the install was easier than I thought it would be.
Did you find this helpful?  0 of 1 Found Helpful
Reviewed by:  from Tallassee. on 2/8/2017

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